﻿
#include "opencv2/imgproc.hpp"
#include "opencv2/imgcodecs.hpp"
#include "opencv2/highgui.hpp"

using namespace cv;

// Declare the variables
Mat src, dst;
int top, bottom, left, right;
int borderType = BORDER_CONSTANT;
const char* window_name = "copyMakeBorder Demo";
RNG rng(12345);


int main(int argc, char** argv)
{
    std::string path = "D:\\Desktop\\img\\Cpp.png";

    // Loads an image
    src = imread(samples::findFile(path), IMREAD_COLOR); // Load an image

    // Check if image is loaded fine
    if (src.empty()) {
        printf(" Error opening image\n");
        printf(" Program Arguments: [image_name -- default lena.jpg] \n");
        return -1;
    }

    // Brief how-to for this program
    printf("\n \t copyMakeBorder Demo: \n");
    printf("\t -------------------- \n");
    printf(" ** Press 'c' to set the border to a random constant value \n");
    printf(" ** Press 'r' to set the border to be replicated \n");
    printf(" ** Press 'ESC' to exit the program \n");

    namedWindow(window_name, WINDOW_AUTOSIZE);

    // Initialize arguments for the filter
    top = (int)(0.05 * src.rows); bottom = top;
    left = (int)(0.05 * src.cols); right = left;

    for (;;)
    {
        Scalar value(rng.uniform(0, 255), rng.uniform(0, 255), rng.uniform(0, 255));

        copyMakeBorder(src, dst, top, bottom, left, right, borderType, value);

        imshow(window_name, dst);

        char c = (char)waitKey(500);
        if (c == 27)
        {
            break;
        }
        else if (c == 'c')
        {
            borderType = BORDER_CONSTANT;
        }
        else if (c == 'r')
        {
            borderType = BORDER_REPLICATE;
        }
    }

    return 0;
}